Antenna structure for a handheld electronic device



FIG. 1 is a front perspective view of an antenna structure for a handheld electronic device according to the present invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken line showing of the handheld electronic device is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an antenna structure for a handheld electronic device, as shown and described. 